The objective is to assess the efficacy and tolerability of a combination of 400 mg ibuprofen plus 1000 mg acetaminophen, 200 mg ibuprofen plus 500 mg, acetaminophen compared with a combination of 400 mg ibuprofen plus 25.6 mg codeine (Nurofen Plus®) and a combination of 1000 mg acetaminophen plus 30 mg codeine (Panadeine® Extra) in terms of total analgesic effect, peak analgesic effect, onset and duration of action and the subject's overall assessment of the study medication.